enableDeviceNOverprintPreview
Enable or disable DeviceN+overprint preview mode.
[read/write property]
enableDeviceNOverprintPreview([out, retval] VARIANT_BOOL *on)
enableDeviceNOverprintPreview([in] VARIANT_BOOL on)
If this is enabled, XpdfViewer renders the PDF file in DeviceN (CMYK +
spot colors) mode, with overprint preview. This is useful for
prepress previews. The default value is disabled.
VB:
viewer.enableDeviceNOverprintPreview = True